How About a Puzzle Thread?

What's that in the fire, and not in the flame?
What's that in the master, and not in the dame?
What's that in the courtier, and not in the clown?
What's that in the country, and not in the town?
What am I?

"...of no more satisfying conceit than the discovery of such hidden depths of character in one's own child..." - From Survive the Savage SeaIntegrity is doing the right thing when no one is looking.